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INDOOR LIGHTING SYSTEMS

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GENERAT

ETECTRIC

GENERAL ELECTRIC INDOOR LIGHTING SYSTEMS

Use fhls guid.e to select the proper luminaire tor yourlighting applicationll you know the type and rating ol the luminaire or accessoryyou need tor an industrial or commercial lightinq application,use_ this index to go direc y to the appropriaie prddubi section.. .lt you know only the details of the room you wish to light,

]a

follow through the industriat sample problem"on pages 16 6nd

r/. or tne commerciat sample problem on pages g4 and g5 toselect the most appropriate lighting systilm- and number ofluminaires req uired.Detailed photometrics for use in zonal cavity calculationsare available from your local GE representative. (See page'101 for nearestoffice location.)

HMPSHrcH-tNTENStTy DISGHARGEThe term "high-intensity discharge lamps,' commonly called "H/D lamps," describes a varietv oflight sources. Their common characleristic is ihatthey. consist ol gaseous-discharge arc tubes,which operate at pressures and cu-rrent densitiessufficient.to generate desired quantities of luminous radiation within their arc only. The differences then between the various Hlb lamD tvoesis the arc tube construction (material) dnd''themetallic additives inside the arc tube.Today, there are three common HID lamps:

The. selection . of a lamp source, therefore, is

critical to the lightingsystem,s performance, cost,and over-all economics and should be oiven vervcarelul. consideration prior to the setej on oi itumtnatre.

Generally speaking, it is always more economi_

cal to use the highest wattage-or highest lumen

outqut,lamp that can properly and comforlably be

applied to a given area. Economics. however, is

(HlD)

LAMp SELECTTON

certainly. not lhe only criteria in jamp selection.

Good lighting quality and comtort shbuld be themain consideration and goal of the lighting designer. Good lighting application usuall! sug"gestsan. approxtmate lamp wattage and type to beutilized as a function of the-desired iilLminationIevel and mounting height.Some important lamp characteristics to be considered are:Lamp LileRated lamp lite of HtD lamps is

burning hours at which 50%

lail. See chart, page S.

'lf.?Ti":;'"j

ra

Lamp EfficiencyThe lamp efliciency is rated in "lumens perwatt," which is a measure of the light outputin lumens produced per watt of power consumed. See chart, page 5.Lamp Lumen DepreciationThe.gradual decrease. in light output of a lampas it burns is described as lamp lumen dd_preciation. The result is a very slbw decrease

in footcandle level as the iighting system

ages.. HID_ lamps depreciate

af vary-ing'ratesand this factor must be taken into aicountwhen selecting and designing Iiqhtinq svstems. ln actual practice the illumination le;elof any installation also declines because ofdirt accumulation on the luminaire itself. Seechart, page 5. This subject is discusseJ inmore delail on page 18. Typical lumen deprectatton curves are shown below:

fre

LAMP LUTIEI{ DEPRECIATION

tr

zo

fo

FD

F!

(,

BURIIIT{G

Lamp Warm-Up Time

When initially energized, HID lamps will take

some time to come up to full light output.

This is

>rt

nalural characteristic

ol all HID

sources and varies depending upon the type

of lamp selected. See the chart below.

Lamp Re-Slarl Time

lf, while in operation, a lamp is extinguisheddue to a momentary power interruption orlow voltage condition the time required forit to re-start will vary with the type of lampbeing used. See the chart below.

basd on verlical buming. Flefer

SUMMARY' OF ECONOMIC COMPARISON

A typical industrial installation would show com-

to lamP supplier tor Iatest dala

lamp

;1"j

&

SUGGESTED LAMP SIZE AND LUMINAIRE TYPE

FOR GIVEN FOOTCANDLE LEVELS

parative lamp economics as shown below:

#s

.,

Re-Stad Time-Minuteo (Time

tor lamp to re-ignite atter it hasbeen extinguished)

t;O

r@

ITTUMINATION LEVETFOOTCANDLE SELECTION TABLEThe following recommended lighting levels are repreciates with use, the lighting installation shouldprinted from llluminating Engineering Society pubbe designed and the luminaire selected on thelrcatrons and represent the minimum recommendedbasis oI minimum maintained light levels, ratheraverage maintained footcandles On the task at anythan initial or average values.time. Because the light output ol any luminaire de-

or special tools are required. A simple lourstep

A high-qua ity optical syslem, designed with precise control

of light using the high intensity discharge

larnp sources, demands the best in reflector design and construction.

The combination of many characlerislics is required forideal performance and durability desired in the varied applications of general industrial use. No one type of reflector ingeneral use today truly fulfills this need. Whether it be prismatic glass, Alzakt aluminum, or porcelain enamel sleel-

each has certain limitations. General Electric

FO

al

1.

Consult instruction sheet

iincluded with luminairewhen shipped) or othercatalog data to determinedesired performance(S/MH) and correspondingsocket position.

2.

Remove optical assembly

from llrminaire and unscrewlamp from socket. Loosensocket holder retaining

clip screws until socket is

free to move and clipsrotate out of the way.

engineers,

through continuing research and development, are searching

for the optimum in materials and processes to meet thisneed. The ALGLAS reilector finish is a result of this effort.The ALGLAS tinish is a thin, transparent, llexible coatingof very high quality glass which is chemically bonded to thealuminum of the reflector. Ihe retlector is accurately formedinto the shape desired for precise optical performance. Then,it is dipped into a solution of silicate material, dried, andheat treated at temperatures in the annealing range ot thealuminum. The unique ALGLAS film is formed consisting ofmore than 95% Silica (SiOt chemically bonded to tbe aluminum. The Iinished product combines desirable qualities ofaluminum and glass and eliminates undesirable qualities ofeach.

ALGLASJinished reflectors have the following basic properties:

1. Physical characteristicsStrong, yet lightweight andimpact resistant. The glass -film is highly elastic and willcrack only when bent approximately 170' on a radius oI /s".2. Chemical stabilityBecause it is inert, the glass coatingaffords high resislance to corrosive environments. Because il

ETECTRICAT PERFORMANCEGE Lighting Systems Department HID ballastsare constructed of the tinest materials availablewith the most modern precision oroduction eouiDment in the industry. The rapid change by ctistbmers from filament to the HID light lour'ces hasresulted in a ballast volume requiiement sufficientto justify the high inveslment expense necessarylor optimum tooling. This tooling enables us to ob'tain consistent high quality in -ballasts which willgiv_e predictable performance and reliability..The reliability.of the ballast assembly is determined by the total insulation system. The ballast

insulation system, consisting ol the wire enamel

coating, the bobbin molding compound, and thermpregnating varnish, has been continuouslv eval_uated over a number of vears in a soeciailv de_signed test chamber whiCh provides bxtrem'es intemperature, humidity, and switching transients.Tfris assures reliable operation over i produciblelife under.any operating conditions likeli to be encountered.

The following table details the electrical characteristics of the General Electric indoor fixtureballasi.

We'll sehd you back a computer-prepared analysis

ta

giving you a comparison ol any number ol proposed systems. ln addition, the analysis will compare all this data on the basis of:(1) lnitial lootcandles(2) Average footcandles(3) End of relamping lootcandles

This multitude ol comparisons ofter additional

aids in luminaire and system selection. A typicalcomparison is shown below.

SUGGESTED I.UMINAIRE

TNAINIENANCE FACTORS(COMPARATIVE LUMINAIRE

LAMP MAINTENANCE)

faMERCURYLAMP: H100DX38-4 (ASA H-38JAn00DX)100 Watt

Open-ventilatedEnclosed w,/filter

LAMP: H175DX39-22 (ASA H39KC-17S/DX)

175 Walt

24,000

Open-ventilated

24,OOO

LAMP: Hl75WDX39-22 (ASA H39KC-1ZS/WDX)

Watt

Open-vsnlilated

.85(a).85(a)

Enclosed w/filter

LAMP: H250DX37-5 (ASA H37KC-250/DX)

250 Watt

Open-ventilatedEnclosed w/tilter

Open-ventilated

.80(a).80(a)

LAMP: H400DX33-1 (ASA H33GL-400/DX)

Open-ventilated

LAMP: H400WDX33-1 (ASA H33GL-400,/WDX)

Opgn-ventilatedEnclosed w/lilter

Open-ventilatedEnclosed w/tilter

.7'(a'l

Enclosed w/tilter

.68(a)

ra) Mean Lune' s over 16.000 t-ours (qroup retamprns

(b) Mean Lumens over lo.OOO hou6 -

(c)Mean Lumns ovr 12.000 hou6

td) Mean Lumens ove, 15.OOO hourc(e) Mean Llmens ovr 2o.oOO hours

(i) Mean

Lumens over 3,000 hours

.9s-.90

.79-.70

.82-.76.83-.80

.78-.70.90-.85

.83-.77.84-.A2

.78-.70.90-.85

.77-.72

.9&.9524,000

.78-.70.90-.85

.42-.76.82-.80

.78-.70

.79-.74.80-.78

.9&.95

.78-.77

.90-.85

tife

.90-.78.95-.90

.90-.78.95-.90

16,000 hours)

.67-.60

.77-.73

.76-.66.80-.76

6,500

.66-.60.76-.68

.77-.67

.67-.60.77-.73

.82-.77

.72-.62.77-.72

.76-.66.80-.76

.68-.63

.74-.64

lnitial Lumens.74-.70.90-.85

.61-.53.65-.61

22,500

20,000

63,000

58,OOO

.64-.57.74-.70

.78-.74

.63-.55.66-.63

9,500

.66-.59.76-.71

Inltial Lumens.78-.70.90-.85

.62-.56.72-.6A

lnitial Lumens

+ hours rated lite

.97-.90

8,150

.42-.77

lnitial Lumens

tite

.90-.78.95-.90

+ hours rated

.77-.67

lnitial Lumens.90-.85

4,200

.65-.59.75-.71

lnitial Lumens

.90-.78-95-.90

+ hours rated

.97-.90

.43-.77.84-.82

+ hours rated tite

24,OOO

.75(a)

.68(a)

.95-.90

.98-.95

.98-.95

Open-ventilated

.90-.78

.90-.78

.82(a)

.78-.70

.90-.85

lnitial Lumens- 12,100

_97-.90

24,000

.75-.65.80-.75

lnltial Lumens

hours rated life

.97-.90

LAMP: H1000WDX36-15 (ASA H36cW-1000/WD)0

1000 Watt

.82(a\

LAMP: H1000DX36-15 (ASA H36cW-1000 tDX)

1000 Watt

.90-.78.95-.90

.97-.90.98-.95

.81-.75.82-.80

+ hours rated life

24,000

24,000

.90-.85

+ hours rated tite

.97-.90.98-.95

.74-,70

.95-.90

.90-.78.95-.90

.97-.90.98-.95

.85(a).85(a)

Enclosed w/filter

400 Watt

24,000

.86(a).86(a)

Enclosed w/tilter

400 Watt

.90-.78

rated tite

.97-.90.98-.95

24,000

LA[4P: H250WDX37-5 (ASA H37KC-250/WDX)

250 Wati

+ hours

Initial Lumens

tife

.97-.90.s8-.95

.86(a).86(a)

Enclosed w/filter

'175

+ hours rated

.84.84

.55-.49.63-.60

.5&.4S.61-.58

Note: For additionat data s6

OLW-9007

'fo

.---r-

}0

METAL HALIDELAMP:

M175lBU-7500 hours

175 Watt

Enctosed w/tilter

LAMP: M175/C/BU175 Watt

lnitial Lumens

rated lile at 10 hours/start

.72(t\

.98-.95

.95-.90

.90-.85

.76-.7 4

.95-.90

.90-.85

.70-.68

Enclosed w/filter

.98-.95

.721t)

TI

Open-ventilated

.78(d)

Enclosed w/filter

.781d)

LAN4P: MV400/BUH400 Watt

.97-.90.98-.95

.90-.78.95-.90

.78-.70.90-.85

.76-.70

.76-.74

or MV400/BD-10,000 hours rated lile at 10 hours/start

Open-ventilated

.80{b)

Enclosed w/lilter

.80(b)

LANIP:'1000

Open-ventilated

.7e(b)

Enclosed w/filter

.7e(b)

MV1000/BU/l-

Watt

.90-.78.95-.90

.97-.9098-.95

.74-.70.90-.85

Open-ventilated

.80{b)

.80(b)

LAMP: MV'1000/BUH

FC

1000 Watt

.80(b)

Enclosed w/filter

.80(b)

LAMP: MV1000/C/BUH1000 Watt

10,000 hours rated life

Open-ventilated

.97-.90.98-.95

.97-.90.98-.95

at

.80(b)

Enclosed w/filter

.80{b)

34,000

34,000

.97-.90.98-.95

.72-.AA

.77-.72

.90-.78.95-.90

.78-.70.90-.85

.77-.71.78-.75

.90-.78.95-.90

.78-.70.90-.85

.77-.72.78-.77

.90-.78.95-.90

.78-.70.90-.85

.77-.72.74-.77

.90-.78.95-.90

.7A-,70-90--85

.77-.72

.72-.62

.78-.77

.77-.72

.7A-.70.90-.85

.87-.81.88-.85

.71-.62.75-.71

.72-.62.77-.72

lnitial Lumens.72-.62.77-.72

lnitial Lumens

34,000

.62-.55

lnitial Lumens

10 hours/start.97-.90.98-.95

.60-.55.70-.66

.70-.60.74-.70

lnitial Lumens

10,000 hours rated life at 10 hours/start

Open-ventilated

.62-.56.7a-.77

10,000 hours rated lile at 10 hours/start

Enclosed w/filter

14,000

.55-.61

-68-.65

lnitial Lumens

LAMP: N,1V400/C/BUH or MV400/C/BD-10,000 hours rated life at 10 hours/start

Nole: For addiiional data see

INTRODUCTIONlncreased use of H.l.D. Iighting in commercial andinstitutional interiors has shown a need for a morecritical method of rating the audibility of a plannedinslallation. Satisfactory installations can in mosl instances be achieved if ihe equipment is selected forcompatability with the ambient sound levels to befound in the area due to air-conditioning and ventilation. people- music. and other equipmenl such as typewriters, cash registers, elc,A new lighting system noise ratinq method has beenformulated by cE to enable the tighting designer tomake this selection with a maximum of accuracy (solarge safety faclors are not needed) and a minimumof.computation. The rating is designed so that only theminimum knowledge of acoustics presented he;e issufficient to rate a planned installation.The new rating is called the Lighting System NC-Rating.A typical rating is of the form LSNC-4s, LSNC50. etc. lt is determined by averaging measurementsmade on six unils of the type to be rated selectedat random from ihose manufactured. General Electrichas shown that sufficient statistical accuracy requiresthat six units be tested. A recently adopted standardspecifies that "one or more'i be tested. (See NE[,4APublication LE2-1974, "HlD Lighting System NoiseCriterion ILSNC] Ratings".) Experience has shown thataudibility of a lighting system does not depend on theabsolute sound level but whether the hum is audibleabove the ambient noise present in the room. ll thehum blends into the background noise, the installalionis inaudible. We say, in this case, that it is masked bythe background noise. lf the hum obtrudes above theambient, then the installation may be audible or evenannoying.

THE MASKING AMBIENT RATING

.Specifically, the Lighting Systems NC Rating is theminimum level of backoround noise which masks thehum from a 100 footcandle installation of the units ina typical indoor environment, The numerical ratino on

where the ambient is 35 dBA, the hum will be audible,

and even possibly annoying to some listeners. For anambient in the range 40 to 50 dBA, the hum may or

may not be audible depending on the listener. This

region is called "possibly audible" on the Audibility

Chart in Figure 1.Note that often a contractor, consultant. or owner inspecls an installation prior to occupancy. or even priorto completion of the air-conditioning or other equip-

lf.the LSNC-42 systeni is instatied in a typical supermarket or merchand;sinq store where the ambientsound levels range from 50 to 65 dBA, the hum willbe completely inaudible as indicated on the audibi!itychart (Figure 1). lf, however, the room is a librari

fe

acoustic tile ceiling, hard walls, and hard floor.

For those installations which depart from the Iighting

or acoustic character of the reference installation used

as a basis for the rating, the lighting designer whowants greater accuracy must apply several correctionfactors to the basic rating assigned to ihe product.These corrections are usually small so that the systemcontains reasonable safeguards against misapplicatjon.

The loIo,^ing is a step-by-step melhod ol obtairring

lhese correctrons to be simplv added to lhe LightingSyslem NC Rating assigned td the lighting unit.''1. LSNC For the lamp/ballast/fixture chosen for theinstallation, look up the rating in the productliterature. Suppose, lor example, the ratingis LSNC-42.2. LeSelect the desired average maintained footcandle level. Suppose, for example, the design level is 200 fc rather than 100 {c. FromTable 1 obtain the illumination correctionlactor LE - I 3. Revise the total rating upward from LSNC-42 to LSNC-4s.

15 1o 35

35

lo

70

70

to

140

140

to

300

-6

+3TABLE

has

noise

CORRECTIONS TO RATINGFOR NON-TYPICAL INSTALLATIONSNot all installations aie 100 fc in a room with an

3. Ln

is a typ;cal indoor installation having acotistic tile ceiling.'gypsum or con

crele block walls. and a vinyl tile or wood ftoor. Suppose that a ljqhl level of 100 footcandles has beenchosen and the designer wants to know whether thehum from the installation will be audible. He findsfrom the product literature that the rating for the Iighting unit to be used is LSNC-42. tn Figure 1 the doatedline has been drawn representing suih a system.been selected. The application

will contribute to the background

level. Under this condition the hum of the lighting system may be annoying;while with completion of the joband with the normal activity of the occupants this willbe reduced to an acceptable or inaudible level.

lf the designed installation departs in acoustic treatment from the typical room, lhe roomreverbration correction factor LB must be applied to the ratinq. The tvpical room has anacoustic tile ceiling, walls, and floor. A widerange of acoustic reflectances can be encountered among practical interior surfaces.However, significant corrections to the ratingoccur primarily for highly reverberant roomssuch as gymnasium, swimming pool, andIarge auditorium installations. A good rulepools is toof thumb for gyms and swimmingadd the correction L5= I .lQ to the LSNCrating. For almost all other indoor installations, this correction is small. Table Il showsthe ranges of LF correclions for lour primaryclasses of rooms.

to

'.--ROOM REVERBERATION CORRECTION FACTORS-L^

Rangesseveral

)1

of correction lactors for the installation NC rating

ditferent types of rooms.

in

MEDIUM LIVE ROOM

MEDIUM-DEAD ROOM

ChurchcymnasiumFactory

good sound absorption

propedies, e.g,Ceiling: fiber glasspanel boards

GymnasiumSwimm ing Pool

absorplion, e.g.Ceiling: fiber board or

-All room sutlaces are

hard, e.g.Ceiling: plastered

gypsum or concreteWalls: painled brickor concreteFloors: concrete

fiber glass paneling

Floors: tiled or wood

The corrected rating for the installation is iound from

ihe sums LSNC I LE:] LF. To determine the audibility

of the installation, cbmpare this new value eilher(1)Use Figu re 1, or

is as

(3)

to the range of estimated ambient sound levels ob-

(4)

io the noise criterion (NC) design level used to

tained from figure 1, or

specify the air-condiiioning system (Use Figure

follows:

to

application

1).

SUMMARYthan iheoi the rating

ambient expected or speciJied from the airconditioning, equipment, and people present in thehum may be audible but not annoving

is appropriate to the particular installalion.

3. lf the Rating is equal to or less than the LSNClevel specified or expected in the s.pace when occupied, and the appropriate air-conditioning is on, nohum will be audible. This is determined by constlu.cting a ve_rtical line on Fig. I for the corrected LSNCrating oJ the proposed system.4. lf the Rating is-between zero and 10 dB higher(LF) as

Adjustable Beam Spread

55'C and 65' C

Alglas Reilector Finish

SAMPH UGHTING PROBTEM

FOR QUICK ESTIMATION OF YOUR INDUSTRIAL LIGHTING APPLICATION

Problem: To select the proper Iighting equipment

to illuminate a Paper Manufacturing Area used forinspection with the following room dimensions:Width

ri

100 feet

Length

200 feet

Ceiling Height

33 feet

(a

Known:1. The normal visual iask is performed at

a height ot 3 feet above the floor and the fixtures musl not hang below the bottom ol the rooftrusses in order to avoid possible damage lromcranes and portable equipment.2. Voltage is 277volts.3. Maximum ambient temperature at tixturelevel is 145o F.

Procedur. . .FTT{IT

Fri?:tl

FooTcANDLES

to the RECOMMENDED ILLUMINATION

LEVEL listings on Page 6 to determine the footcandle level to be used in further calculations.Recommended minimum maintained level lor apaper manufacturing inspection area is 100 FOOTCANDLES.Reler

RooM cLAssrFrcATroN

Refer to the ROOM CLASSIFICATION SELECTOR

on Page 19 (Reproduction Below) to determine the"Room Cavity Ratio (RCR)" to be used in later calcu lations.Answer: For 100' wide, 200' long and 27' MHRCR:2.0.

E{.iEiDT LAMP SELECTIoN

Due to advantages in economics, efficiency, lamplumen depreciation, warm-up and re-start timeslamp choice is LUCALOXoPage 4 & 5.Lamp rating will be 400-watts.

ROOM CAVITY RATIO

FOR LIGHTING CALCULATIONS

FTEII-I

LUMINAIRE ENcLoSURELuminaires will be operated in a moist, dirt

(D

laden

atmosphere with some corrosive vapors in air due

to vapors from process. Lighting will be cycled

"on-off" once each dayapproximately 14 hoursoperation per cycle.Enclosure choice is enclosedlilteredFILTERGLOW@

LUM NA FE MOUNTING HL GI]T (FEET]

(l

$[ff,[-

!l

LUMTNATRE

rur,n to appropriate product section of this

sELEcrtoN

f[ serctlc BETwEEN FtxruREs

Extend the line you drew on the left graph in

Step 81 on over to the graph on the rightS/MH Selector. Read the RecommendedSpacing Between Fixtures" trom left handborderbl graph. Recommended Spacing Between Fixtures :'17 FeeL4OO-WATT LUCALOX-SINGLElndoor Lighling Eslimalor

U.ing the simplified "lndoor Lighting Estimator" (lLE) at the bottom of the Filterglow.Page 29, proSingle400-wattLucaloxceed as tollows:

l!

or FrxruREs FEeutREDBegin at bottom of lell graph on point of desired initialt Jootcandles and go up to diagonal line denoting the RCR (Room CavityRatio) that you determined lrom the chart inStep No. 5.

ruo.

srruH (BEAMseREAD) oF LUMtNAtRE

Extend the line 10 the point where it intersects lhe vertical line for mounting height.

fll

This is the tixture spacing to mounting height.

The luminaire spacing to mounting heightshould exceed this value. The number inparenthesis followinq lhe room cavity ratio isthe spacing to mounting height that will givethe highest Iight level.This value should be used unless a widerluminaire spacing to mounting height is determined lrom the S/N4H Selector.Our lixlure should be a 1.0 S/MH.4OO-WATT LUCALOX-SINGLElndoor Lighling Estimator

vious steps 400-watl Lucalox-Single 1.0

WHY ENCLOSED FILTERED?

WHY OPEN-VENTILATED?

Why? because Filterglow@ and Lowmount@ units

stay clean inside lor maximum lighting elficiencyand lowest total cost of light.With Filterglow and Lowmount luminaires, lightoutput stays high. You get more of the light you'repaying for, longerplus high maintained- l/aintenance cosls govisibilityon working surfaces.down,too. A once-in-a-while wipe-off of lhe outside ofthe door glass is all the maintenance normallyneeded between lamp changes.As a lighting system performs, light output is reduced because:. Lamp light output depreciates with use. Near theend of lamp lile, some lamps are less than halfas bright as the day they were first turned on.. Dirt and contaminants collecting on the luminaire interior and lamp surlace significantly reduce light output. This occurrence is greatly increased if the luminaire is cycled "on" and "oll"

Why?, because the open ventilated construction

of GE Duraglow, Miniglow@ and Econoglow@ luminaires features a llow-thru "chimney actlon" thatcarries dirt right out the reflector.As shown below, the heating eflect ol the lampcauses a noticeable llow of air to move past thelamp and through the reflector. ln lact, the airmoves so rapidly that dry airborne dirt and dustparticles do not "drop out" onto the reflector sur-

(,4

face.

4a

every day.

Even enclosed luminaires "breathe." When the

lamp is hot, air is forced out of the optical assembly. When the lamp is cooling. air is broughtin, depositing Iight-dimminq contaminants on thelamp, reflector, and inside ol the door glass.With the enclosed GE Filterglow and Lowmountluminaires, incoming air passes through a moldedpiece of activated charcoal. This filter stops atmospheric contaminants before they can do their dirty

work.

Filtering aclion is not continuous. Cleaning only

occurs during expansion, when the unit is turnedon, and contraction, when it is turned off.

This self-cleaning action is only ellective in installations where the luminaires operate continuously 24 hours per day. When the luminaires areturned off, the movement of air is no longer present and the "flow-thru" feature is lost. Without theair flow assistance, the reflector accumulates dirtlike any other exposed surface.Hence, the open ventilated fixture design is recommended where fixtures are operated contlnuously or in locations where the units are cycled"on" and "oJl" only if the surrounding atmosphereis dry and clean.

/o

FILTERED Vs. UNFILTERED

outsld

Filter elements last indelinitely under normal

conditions. And because there's no internal pressure build up-high reliability sealing is enhanced.When calculating the efficiency of a total system,designers must account for a decrease in initialefficiency with a "maintenance factor." Regularcleaning and relamping programs are necessaryat intervals to recover this lost efficiency. Howevei,with the Filterglow and Lowmount luminaires, thelight lost due to the effects ol dirt is dramaticallyreduced.The table on Page 10-11 suggests typical maintenance factors for several types of industrial lighting fixtures. The significaniiy higher maintena"ncefactors for Filterglow units are a major plus forlndustrial lighting users who seek the lowest totalcost ol light.

LUMINAIRE DIRT DEPRECIATION

The light output of any lighting system depreciates with use. This "lost" light causes a corresponding decrease in light level at the work surface. This depreciation is explained by:.1.The normal light output depreciation of thelamp source. (See discussion Page 4.)2. The accumulation of dust and dirt on:a. Building ceiling, walls and floorb. Lampsc. LuminairesThe accumulation of contaminants on the lampand on the luminaire interior reflector surfacescan be appreciable and must be carefully considered when selecting a fixture type to use.

ro

ta

TEI|NPERATURE-

I:1

AMtsIENT TEMPERATURE CONSIDERATIONS

Amblent temperature is the temperatu re surrounding the luminaire when operating. General Electricum naires are desig ned for continuous operation at rated maximum ambient temperature without lossoi life due to premature failure o{ electrical com ponents. General Electric deslgns are temperaturerated as f ollows:IIAXIIUM AIIBIET{I

TUTINAIRE TYPI

lowmountlo[conoglow'3]mount)

MnM

nimite*

PERATURE RATII{G

55'C (131" f) or 65'C (149"

55'C (131' t) or 65'C (149'

Filterylowt)DuraglowMiniglow1o

]E

llr

40'c (104. F)40. c (104. F)55' C (l3l' F)40'c (104" F) or 55'c (l3l'

.40" c (104'F) or 55"

)1

(131'

F) orF) or

90'90'

(193'(193'

F)F)

F)

As ls itue of most electtical components, over lemperature operation of

luminaires should always be avoided- 0peration of electricai devices atl0'C over their rated temperat!re reduces life approximately 50o/0.Conversely, operation ai 10'C below rated ambient will greaily increaseluminaire life.

lamp(s) from a nominal (120-,208-,

completely prewired integral ballast and

oplical assembly{ies). The luminaire shall be suitable for

cdntinuous service in an ambient temperature ol (55',65"C)

and (90'C

ft

in selected

units).

Mechanical ConslructionThe ballast hoosing and structural parts inciuding mounting devices shall be of cast aluminum. To {acilitate mounting, the luminaires shall have separate lightweight removablemounting componenls that can be easily removed irom theballast housing and assembJed to the siructural or mountinghardware prior to mounting of the remainder of the luminaire.The mounting devices must provide a posilive vibralion prooflocking means including a locking set screw.All screws reqoiring removal during normal conduit mounting and/or wiring shall be captive. The wiring access coverplale shall also be captive.

All exposed cast-aluminum parts are to be finished with a

baked electrocoat paint finish.

The ballast housing and optical assembly shall be provided with easy to read moisture-proof nameplale that canbe read without disturbing the luminaire when installed.All ballast and optical assemblies shall incl!de provisionfor

field mounting of safety chains.

Ballast

Operalion

For 55, 650 Unils

The ballast shall be capable of stariing and operating ihespecilied lamp(s) withln the limits specified by the lampmanufacturer. The ballast shall limit lamp wattage variation

tl

lo a maximum of (specify) during ballast inpul vollage variations of -107" from nominai. At rated llne voltage thebailast shall have a rninimum power factor of 93%. Ballastprimary current during lamp starting must not exceed currentduring normal lamp operation (excepl reactor type). Theballast musl reliably start and operate the lamp in ambienttemperalures down to -20'F. The ballast shall be capable

cotnbination with aluminum reilector is much liohter lhan

glass rellector. E'iminales worly over broken'or la ing

B. Baked eleclrocoat paint linish on housings in combi-

naiion with ALGLAS finish on both inside and outside oi

rollector afford maximum corrosion resistance.

For ease of installation and to facilitate maintenance and

replacement, the luminaire shall be shipped as two majorassemblies-a ballast housinq assembly and an optical assembly. l\y'ounting oi the optical assembly io lhe ballast assembly must be secured by positive vibration proof means.Ihe optical and baliast assemblies must include a positive

aligning electrical disconnect allowing the socket to be

shipped factory assembled in the optjcal assembiy. The disconnect must have no exposed live metal parts.The optical assembly shalT be enclosed and gaskeied and

shall include an activated charcoal fjlter to permit passage

of air and therefore allow for breathing of lhe luminaire during normal off-on heating and cooling cycles.Heat and impact resistant glass shall be used to encloseuplight apertures and the bottom door glass opening. Thedoor glass assembly shall be hinged and latched lor lampaccess and shall be removable from the optical assembiywithout tools. The door latches shall be over center typevibration proof providing a spring-like clamping aclion to thegasket.

The filter assembly shall be factory ;nstalled, and shall be

to prevent accidental d;slodgement when luminaireis inslalled.

located

The rellector material shall be formed aluminum with a

chemically bonded lightweighl nonbreakable glass coalingon both the inside and outside rellector surtaces providingcorrosion resistance, durability, and ease of cleaning.The optical assembly shall include an adjustable socketfor varying S/MH which is capable of being field adjustedwithout need lor parts modification or replacemenl and \vithno more than a screwdriver lor tools.

Heat resistance borosilicate uplight cone glass

is

re-

glass.

11. Stainless steel over center travel door glass latches

afford positive vibration proof latching and corrosionresistance.

12. Heavy-duty porcelain socket is complete wjth lamp

grips

for vibration resistant lamp mounting.

13. Drip-proof socket housing construction gives maximum

lamp protection without need for separate drip shieldsor covers.

insure

maximum mechanical strength and vibration resjslance.

4. Wiring access door and removable screws are captivepreventing accidental dropping.5. Provision for field installation of ballast and/or opticalassembly safety chains is standard on all luminaires.

6. Sliding type optical assembly mounting

Oplical Assembly

sistant to thermal shock.

10. Thermal and mechanical shock resistant tempered door

Fillerylow l\Jminaites accent salely-safeiy in design, safety

ol installation and mainlenance, safety of operation.Mechanical

life.

FILTERGLOWSAFETY FEATURES

of wilhstanding continuous operalion with the ballast secondary in a short circuit condiiion without loss of ballast liie.The ballast must be capable of mainlaining operation of arelerence lamp through incoming line voltage dips (selectfrom page B or 9) of rated voltage. The luminaire and ballastshall be of lhe same manufacturer.For 90o C UnitsThe ballast shall be capable of starting and operaling thespecified lamp within the limits specified by lhe lamp manufacturer. The ballast shall limit lamp wattage variation to amaximum (:r10%) during ballast input voltage variation oft5% from nominal. At rated line voltage variation the ballastshall have a minimum power factor of (select from page B or9). The ballast must reliably start and operate the lamp inambient temperatures down to -20'F. The ballast shall becapable of withstanding conlinuous operation with the ballastsecondary in a short circuit condition without loss of ballast

exactJ safe conlact alignment and mating. Wejght of

optical assembly is supported by the ballast housingduring electrical connection or disconnection.

C. Once

in

place oplical assembly

captive safety screw.

is secured using a

D. Disconnect can be used as safety device when

lamping.

re-

t'-

r,

DURAGTOWThe Duraglow luminaire is the ultimate in openventilated indoor luminaires, incorporating featuresnever belore available in open-ventilated luminaireconstruction. The luminaire is designed for efficient and llexible application, economical operation, and attractive styling.The Duraglow luminaire is a flexible and economical lighting system which maximizes lighttransmission and minimizes cleaning. Rated lor

55' and 65" Centigrade ambients and 90"C ambients in selected units, the Duraglow reflector isfinished with the exclusive Alglas@ process that isas smoolh as glass and unbreakable.The luminaire is ideal for hangars, warehouses,recreation centers, assembly plants, maintenanceareas, commercial facilities and numerous otherapplications. Look at the fealures the innovativeDuraglow olfers you.

num ballast housing assures years

glow ballast housing

provision lor lield attachment of

salety chain{s) if desired. A safetychain may also be attached fromthe ballast housing to optical assembly for added safely.

nLrrn

ADJUSTABLE SOCKET-Ex-

clusive adjustable socket

provides just the righl lamp position wiih respect to the reflector.S/MH ratio can be varied by sim-

DIE.CAST SOCKETING-DUrable d e-cast alum socket housing positions the

ple screwdriver adjustment

evon

wilh unit installed and without

need fot new or extra pads or

lamp accurately, protects

thesocket assembly and eliminalesprotectors,need for separaie drip

special lools.

Heavy duty porcelain socket has

fc

curate light control of both phosphor coated and clear HIO lamps.Tho ALGLAS silicate film is chemically bonded to the aluminum ioseal the aluminum surface. ALGLAS is lighlweight, non-breakable yet smooih and as easy toclean as glass. There's also anALGLAS coating on the refleclorexterior surface to provide a protective corrosion resistant finishon the outside also-

All exposed cast-aluminum parts are to be finished with

baked eleclrocoat palnt tinish.

The ballast shall be capable of starting and operating the

specified lamp within the limits specilied by the lamp manufacturer. The ballast shall limit lamp wattage variation to amaximum (:l:107o) during ballast input voltage variation of157" from nominal. At rated line voltaqe variation the ballastshall have a minimum power factor ot (select from page 8 or9). The ballast must reliably start and operate the lamp inambient temperatures down to -20'F. The ballast shall becapable ol withstanding continuous operation with the ballastsecondary in a short circuil condition without loss ol ballastlife.

Optical AssemblyFor ease of installation and to facilitate maintenance andreplacemenl, the luminaire shall be shipped as two majorassemblies-a ballast housing assembly and an optical assembly. Mounting of the optical assembly to the ballast as-

Ballast OperalionFor 55, 65' C UnitsThe ballast shall be capabl of starting and operating thespecified lamp(s) within the limits specified by the lampmanufacturcr. The ballast shall limit lamp wattage variationto a maximum of (specity) during ballast input voltage variaiions of 1107o from nominal. At rated line voltage the ballast

The reftector material shalt be formed aluminum with a

chemically bonded liqhtweight nonbreakable glass coatingon both the inside and outside reflector surfaces providingcorrosion resistance, durability, and ease of cleaning.The optical assembly shall include an adjusiable socketfor varying S/MH which is capable of being field adjustedwithout need for parts modification or replacement and withno more than a screwdriver for tools.

Mechanical

'.

aligning electrical disconnect allowing the socket to be

shipped factory assembted in the optical assembly. The dis-

connect must have no exposed live metal parts.

The opticat assembly shall provide uplight and be of theopen ventilated type.

sembly makes safe

conduit

400-watt ballasts lor all light sources and is rated

for maximum 40o Centigrade ambients. The ambient limitation is a result of the acrylic refractorand is independent of the electrical components.The luminaire is ideal lor lactories, loundries, canneries, textile, metal, chemical, rubber, food, cement, and numerous other plants. Look at the features the Lowmount luminaire olfers you.

NAMEPLATE

Permanent

- nameplateplastic-coatedgives complete luminaire de-

positive

iI

0i Il

fr!

rflx

fi

rfi

tails.

or pendant mounting

simple and easy.

EI'*|T"? i?iH^3"'#;[plalement with captive cover

SAFETY CHAIN-B a I la sthas prov;sion lor lield ai-

[-__l

tachment of safety chain.

tr+ihH1"l'""ti''l,Scast aluminum ballast housing

FILTER-Activated

coal filter

assures years of safe, trouble-

lree operation.

E: :"'-i J5,'"ii"T fl i;and out.

-...\'

char-

removes air-

borne contaminants belore they

enterthe optical assembly whileprovidinq the easiest path forair to move in and out of the

vided with and easy-to-read, moisture-proof nameplate.

The optical assembly shall be open and ventilated. lt shall consist of an Alzakt reflector, anda diffused prismatic acrylic refraclor. The refractorshall be held in place by lhree retainer clips, andshall be capable of being removed without theuse of tools.

BALLAST OPERATIONThe ballast shall be capable of starting

and

operating the specific lamp within the limits specified by the lamp manufacturer. The ballast shalllimit lamp wattage to a maximum of (specify)during ballast input voltage variation ol !1Qyolrom nominal. At rated line voltage, the ballastshall have a minimum power factor of 93%. Theballast must reliably start and operate the lampin ambient temperatures down to -20' F. Theballast shall be capable of withstanding contlnuous operation with the ballast secondary in ashort circuit condition wilhout loss of ballast lile.

tr,llNlG[0w'The Miniglow Luminaire features open-ventilated

reflector construction-ALGLAS@ protected. The

Miniglow is available tor use with long life mercuryvapor lamps and is suitable for use in areas withambienl temperature up to 40'C (104o F).The Miniglow luminaire is recommended for

general indoor lighting. It's particularly suitable

for use in low footcandle areas, or where Iow overhangs or low ceiling heights restrict use o{ largerand bulkier high-wattage units. You can use it innew construction or to replace old fluorescenl andincan descent u nits.

REMoTE powER coNNEcroR (CABLE)

Use with standard Filterglowiai and Duraglowunits when it is desired to mount the ballast remotely from the optical assembly. Use with unballasted Lowmounto, adapter when it ls desired tomount optical assembly remotely from Fillerglowballast housing.Consist of 600 volt No. 14-3 conductor U.L. approved type 105. C ST cable with female quickconnect plug and hanger assembly on one end(connects to optical assembly with sliding disconnect and has provision lot 3/a', lhtu feed or pendanl mounting in addition to provision tor 1/a,, bollmounting). Other end has male quick connect plugthat mates with standard F/G or D/G ballast housing connector. For units with flexible conduit seepage 100.

El

TWIN REMOTE POWER

coNNECTOR (CABLE)Same as "F" exceptfor use with twin F/G

or D/G remote ballast.

When ordering bailastspecily for use with twinremote power con nector.Lamps in Series-120-,208, and 480-vol,4oo-wat3-Ft. Cord5-Ft. Cord7-Ft. Cord10-Ft. CordLamps in Parallel

For wiring by others

the indjvidual quick

cLAss ,,A,' oplcAl AssEMBLy ADAeTER

section 9231 page 1) for warehouse aisle lighting.

rately.

Male-C740c259F emale-C7 4OG452

c740G27 4c740G27 4

c740G275

Class

"A" Oplicat

AssemblyAdapter

The adapter is precision cast with integral sliding disconnect, adjustable socket, activated char,coal filter and is designed for use with EEI-NEMAclass "A" optical assemblies. Depending on theoptical assembly and ballast selection the adapterallows you to put together a luminaire suitable foreither 175-, 250- or 400-watt (l\ilercury or MetalHalide) at 12O-, 208-, 240-, 277- or 48o-volt_

order the Remote Power Connector as ,'similar to

except for use with switched emergency lighting."

1Warhouse Luminair

Warhous Lurninaire

Showing Type SAOptical Assembly(175 or 250 Watt)

Showing Type RVOptical Assembly(400 Watt)

DrE CASr POWER HOOK

A die-cast aluminum receptacle hook/box andloop, cord and plug assembly. This special configuration is U.L. approved for lighting applicationsand provides a unique plug configuration to eliminate the possibility of misapplying a conventionalplug of the wrong voltage configuration.

l[

' tl

The unit is composed ol two separate parts

(receptacle hook box, and loop, cord, and plug)and it is necessary to order one of each lo complete one standard u nit.

Oull n

ol assembled roceptacl hook/loop

ORDERING INFORMATIONCOMPLETE ASSEMBLY

Choose app rop riate receptacle hook box dependent upon desired voltage, and then choosethe co rrect loop, cord and plug assembly depending upon voltage and whether fusing is desiredand if so the number requ ired.

twrr,r MoUNTTNG ARM

Use to tandem mount any two luminaires (mustbe of same weight it arm is suspended by hook orloop). Arm is painted steel with two male 3/4 " pipecouplings for luminaire mounting and one Jemale3/4" pipe coupling for hook, loop or direct conduitmounting. Arm has bottom snap-in closure strip forease of wiring. Eyebolt for tield addition of sa{etychain(s) is provided.

Combination H lD/ lncandescent Twin

Filterglow and Lowmount units can be made

available with gasketed construction making theunit suitable for moisture laden or "weatherprool"application. Gaskets are provided at all pointswhere water entry is probable, including the electrical disconnect between the ballast housing andoptical assembly on the Filterglow luminaire. Thefilter, however, is left free to breathe. lt is in a protected location on the Filterglow and a drip shieldis added to the Lowmount.The weatherproof construction does nol materially change the standard luminaire dimensionsand weights as shown in this bulletin.Order by specilying "similar to Cat. Number'(Fil/in standatd catalog number selected tor Filterglowor Lowmount) except weatherproof construction."Minimum quantity per order15 Luminaires.

fl

ousr-rnoor

Filterglow and Lowmount units are available in

gasketed construction making both the optical assembly and ballast housing suitable lor use in dustladen environments. The luminaire is gasketed toprevent the entry of conductlve dust particles intothe electrical componenls or compartments. Theelectrical disconnect area of the Filterglow is alsogasketed. Because the activated charcoal filterkeeps airborne contaminants lrom eniering the'TGdemark of cenral Eleclic CompanyI Proprielary term ol Alumlnun co. ot Amertca

X-Xx-xXXXXXXXXXXXXXXXXXXXXXXXX_X-

XX

X-

optical assembly, it is lree to breathe in the normal

lashion.This construction is not explosion proof.Order "similar to Cat. Number (Use standadcatalog number from section tor Filterglow or Lowmount) excepl dust-proof construction." Minimumquantity per order15 Luminaires.

El

conRostoN REsrsrANrFilterglow and Lowmount luminaires are available with special provisions for use in "corrosive"type environments. The following modifications tothe standard construction are made:1- All exposed screws and/or rivets are of stainlesssleel.2. Paint

finish is special industrial green on all

exposed die-cast parts and on the door glass

clamp band assembly (Filterglow).

3. The Filterglow optical assembly requires no special protection because it has the ALGLAS@coating; however, the Lowmount optical assembly may require special protection lor the Alzakireflector and acrylic refractor. Check factory onLowmount applications.Order "similar to Cat. Number (Fill in standardcatalog number tor Filterglow or Lowmount) except corrosion resistant construction." Minimumquantity per order25 Luminaires.

The Filterglow@ and Lowmounto luminaire can

be made available with special provisions for application in wet, dusty and corrosive environmentsusing severe-duly construction techniques. Thef ollowing measures are taken:1. Gaskets are provided at all points where waterentry is probable, including the ballast housing,mounting bushing, wiring access cover plate,and electrical disconnect (Filterglow).2. All exposed screws

and/or rivels are of stainless

steel material.

Paint finish is special industrial green on all

exposed die-cast parts and on the door glassclamp band assembly (Filterglow).Order "similar to Cat. Number (Fill in standardcatalog number lor Filterglow or Lowmount) except severe-duty construction." l\4inimum quantityper order25 Luminaires.3.

Use where lowest possible heighl integrally bal-

Filterglow, Duraglow, Lowmount, Econoglow@ lll

and Minimount luminaires can be provided withautomatically swiiched quartz emergency lightingto provide "instant on" emergency lighting wheremomentary power interruptions or extreme voltagedips can extinguish an HID lamp. A single ended250-watt quartz lamp(s) (Q250CL/DC) is placed inthe same reflector with the mercury, metal hallde,or Lucalox@ lamp.The quartz lamp will remain on until the HIDlamp reaches approximately 60% of full light output. This also means that the quartz lamp willcome on when the luminaire is initially energizedand remain on until the HID lamp reaches about60% light output.Available in 400- or 1000-watt Luminaires andall system voltages 120-,208-,240-,277- and 480volt, with mercury, metal halide, or Lucalox lamp.Wiring for said lamp is accomplished internalto the ballast and therefore the quartz lamp voltage (12o-volts) is independent of the lighting system voltage. The standard oflering will provideONE 250-watt quartz lamp per HID optical assembly. Two, 250-watt quartz, are available on someballast voltage configurations, if required.Caution should be utilized when sizing branchcircuits with luminaires containing the switchedquartz option as the Iuminaire will draw additionalcurrent during the warm up period, since bothlamps (Quartz and HID) are in operation.NON'AUTOMATICALLY SWITCHED QUARTZ(NO RELAY)Quartz socket is independently wired.

Order "similar lo (till in Catalog Number of

standard single Lowmounf) except to have l-exanref ractor." Minimum quantity per order5 Lumi-

naires.

The Minimite is available in open Lexan up to

and including 17s-watt Mercury, and 1so-wattLucalox. lt is also available in enclosed Lexan in1oo-watt Mercury only.

Order "similar to (fill in Catalog Number ot

standard single Minimite) except to have (open otenclosed) Lexan refractor. Distribution to be (Typespecify)." lvlinimum quantity per order5 Lu-minaires.-

sxrelo ron NO UPLIGHT

! Shieldsfor no uplight are available lor Filterglow or Duraglow lu m inaires.Order "similar lo (till in Catalog Number of luminaite) except to have No Uplight Shield. Minimum quantlty per order15 Luminaires.

MOUNTING ARRANGEMENTS

'l

General Electric luminaires leature the ultimate in simple

yet safe mounting technique. They have been designed tominimize installation time and cost. For normal installation,only a screwdriver and pliers are required for tools. Typicalmounting techniques are illustraled below.

LEVEL listings on Page 6 to determine the tootcandle level to be used in further calculations.Recommended minimum maintained level for asupermarket area is 100-200 FOOTCANDLES. Thecustomer requires 150 initial footcandles.

application. The open downlight luminaire will produce the highest light level and sparkle on the merchandise. A regressed lay-in panel will give thedesired ceiling appearance and brightness control.The luminaire choice is DURAGLOW REGRESSED.

L1I

;;

This will provide approximately 120 footcandles

maintained in open areas, and 115 footcandles inthe aisles.

Eff,f|

LAMP sELEcnoN

Due to life, lumen maintenance and color rendition the lamp choice is DELUXE WHITE MERCURY. Lamp rating will be 400-watts.

to disl!rb adlacent panels.

DURAGTOW REGRESSEDThe Duraglow Regressed luminaire blendslighting efficiency with aesthetics, permitting theeyes to focus on the glittering effect of the lightrather th an the source.The luminaire features rapid and easy installation. Place the optical assembly in the ceiling,plug in lhe ballast and connecl to the power

The llat 2, x 2, lay-in panet and the open optical

assembly combine to provide a neat, unclutteredlook that blends in with the ceiling.The Econoglow Recessed luminaire is suited Jormass merchandising, lobbies, building interiors,aisles and many other indoor appljcations.

ECONOGLOW FEATURES

ADJUSTABLE SOCKETBeam spread can vary by

raising or lowering the socket,even after instailation. Allowsa tailored lighting pattern to fitpresent and future lightingneeds.

TOWMOUNT'The Lowmount Regressed luminaire combines around refractor within a 4, x 4, lay-in panel andblends very well with the spheres, cones, circles,squares and rectangles that dominate most interiorsp

ace-

The luminaire teatures a computer-desig ned

refractor which eliminates glare and hot spotsand spreads the light evenly over a large area.

'Trademark ol Genera Eleclr c Company

pol shed black

Alzakt and sha

provide an 11" open ng Irom below the ceil ng. The cone shall have ats" rlanqe 1o prov de a riush ceiling appearance. The cone shall belnsla led i.om below the ci inq and heid n place by lhree slainlesssree clips The cone shall be comp elely free of any seams, hols poprivets or welds The rellector shall be iluled and providd with a. Azaktfinish The efiic ency shal be nol ess than 55%

sruae-oru TRIM RING

Use where llush mounting in suspended ceilingsis desired. Trim ring snaps on to lower reflectoredge. Finish is off-white, baked enamel aluminumwith three stainless steel spring clips and nylontether. Luminalre must be fully supported fromupper building structure-trim ring does not support luminaire weight.